Dr. Feng Zhao Profile

Dr. Feng Zhao

at Jet Propulsion Lab

SPIE Involvement:

Author

Publications (38)

Proceedings Article | 23 August 2024 Poster + Paper

Precision alignment mechanisms for the coronagraph instrument aboard the Roman Space Telescope

Oliver Krause, Friedrich Müller, Ulrich Klaas, Monica Ebert, Ralf-Rainer Rohloff, Armin Böhm, Tobias Stadler, Roger Lee, Fang Shi, Feng Zhao, Mark Colavita, Douglas Moore, Guido Krein, Tobias Scott, Daniel Schäfer, Sebastian Morain

Proceedings Volume 13092, 1309259 (2024) https://doi.org/10.1117/12.3018881

KEYWORDS: Equipment, Coronagraphy, Space telescopes, Design, Optical alignment, Thermoelasticity, Optical filters, Astronomy, Structural materials

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Proceedings Article | 5 October 2023 Presentation + Paper

Nancy Grace Roman Space Telescope coronagraph instrument overview and status

Vanessa Bailey, Eduardo Bendek, Brian Monacelli, Caleb Baker, Gasia Bedrosian, Eric Cady, Ewan Douglas, Tyler Groff, Sergi Hildebrandt, N. Jeremy Kasdin, John Krist, Bruce Macintosh, Bertrand Mennesson, Patrick Morrissey, Ilya Poberezhskiy, Hari Subedi, Jason Rhodes, Aki Roberge, Marie Ygouf, Robert Zellem, Feng Zhao, Neil Zimmerman

Proceedings Volume 12680, 126800T (2023) https://doi.org/10.1117/12.2679036

KEYWORDS: Coronagraphy, Equipment, Mirrors, Optical benches, Wavefront sensors, Deformable mirrors, Cameras, Prisms, Observatories, Wavefront errors

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Proceedings Article | 27 August 2022 Presentation + Paper

The Roman Space Telescope coronagraph technology demonstration: current status and relevance to future missions

B. Mennesson, V. Bailey, R. Zellem, S. Hildebrandt, M. Ygouf, J. Rhodes, N. Zimmerman, B. Nemati, G. Gonzalez, E. Cady, B. Kern, T. Koch, J. Krist, K. Heydorff, T. Luchik, F. Mok, P. Morrissey, I. Poberezhskiy, A. Riggs, F. Shi, F. Zhao, R. Akeson, L. Armus, A. Greenbaum, J. Ingalls, P. Lowrance

Proceedings Volume 12180, 121801W (2022) https://doi.org/10.1117/12.2629176

KEYWORDS: Coronagraphy, Wavefront sensors, Electron multiplying charge coupled devices, Imaging spectroscopy, Wavefronts, Stars, Spectroscopy, Performance modeling, Cameras, Observatories

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Proceedings Article | 27 August 2022 Presentation + Paper

Roman coronagraph instrument: engineering overview and status

Ilya Poberezhskiy, Kathryn Heydorff, Thomas Luchik, Feng Zhao, Eric Cady, Gasia Bedrosian, Mark Colavita, Brandon Creager, Renaud Goullioud, Tyler Groff, Amanda Grue, Brian Monacelli, Patrick Morrissey, Joshua Kempenaar, Brian Kern, Matthew King, Timothy Koch, John Krist, Gary Kuan, Jonathan Lam, Dorothy Lewis, Fai Mok, David Muliere, Bijan Nemati, Charley Noecker, Jeffrey Oseas, A.J. Riggs, Fang Shi, Belinda Shreckengost

Proceedings Volume 12180, 121801X (2022) https://doi.org/10.1117/12.2630540

KEYWORDS: Coronagraphy, Electronics, Cameras, Interfaces, Mirrors, Control systems, Optical alignment, Observatories, Space operations, Optical benches

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Proceedings Article | 1 September 2021 Presentation + Paper

The Roman Space Telescope coronagraph technology demonstration: current status and relevance to future missions

B. Mennesson, V. P. Bailey, R. Zellem, N. Zimmerman, M. Ygouf, S. Hildebrandt, J. Rhodes, J. Kasdin, B. Macintosh, M. Turnbull, E. Douglas, A. Mandell, B. Nemati, G. Gonzalez, E. Cady, B. Kern, J. Krist, F. Shi, F. Mok, P. Morrissey, K. Heydorff, I. Pobereszhskiy, F. Zhao, T. Luchik, E. Maier, R. Akeson, L. Armus, J. Ingalls, P. Lowrance, T. Meshkat

Proceedings Volume 11823, 1182310 (2021) https://doi.org/10.1117/12.2603343

KEYWORDS: Coronagraphy, Electron multiplying charge coupled devices, Wavefront sensors, Cameras, Wavefronts, Imaging spectroscopy, Stars, Imaging systems, Spectroscopy, Polarimetry

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Proceedings Article | 12 January 2021 Presentation + Paper

Roman space telescope coronagraph: engineering design and operating concept

Ilya Poberezhskiy, Thomas Luchik, Feng Zhao, Margaret Frerking, Scott Basinger, Eric Cady, M. Mark Colavita, Brandon Creager, Nanaz Fathpour, Renaud Goullioud, Tyler Groff, Patrick Morrissey, Joshua Kempenaar, Brian Kern, Timothy Koch, John Krist, Fai Mok, David Muliere, Bijan Nemati, A.J. Riggs, Byoung-Joon Seo, Fang Shi, Belinda Shreckengost, John Steeves, Hong Tang

Proceedings Volume 11443, 114431V (2021) https://doi.org/10.1117/12.2563480

KEYWORDS: Infrared telescopes, James Webb Space Telescope, Telescopes, Coronagraphy, Infrared radiation, Instrumentation engineering, Optical instrument design, Wavefronts, Imaging spectroscopy, Infrared imaging

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Proceedings Article | 15 December 2020 Presentation + Paper

The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) technology demonstration

N. Jeremy Kasdin, Vanessa Bailey, Bertrand Mennesson, Robert Zellem, Marie Ygouf, Jason Rhodes, Thomas Luchik, Feng Zhao, A. J. Eldorado Riggs, Byoung-Joon Seo, John Krist, Brian Kern, Hong Tang, Bijan Nemati, Tyler Groff, Neil Zimmerman, Bruce Macintosh, Margaret Turnbull, John Debes, Ewan Douglas, Roxana Lupu

Proceedings Volume 11443, 114431U (2020) https://doi.org/10.1117/12.2562997

KEYWORDS: Coronagraphy, Imaging spectroscopy, Planets, Infrared telescopes, James Webb Space Telescope, Imaging systems, Wavefronts, Algorithm development, Jupiter, Infrared radiation

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Proceedings Article | 16 September 2019 Presentation + Paper

The WFIRST coronagraph instrument phase B optical design

Hong Tang, Michael Rodgers, Brandon Creager, John Krist, James McGuire, Keith Patterson, Mayer Rud, Fang Shi, Feng Zhao

Proceedings Volume 11117, 111170C (2019) https://doi.org/10.1117/12.2530506

KEYWORDS: Coronagraphy, Optical design, Mirrors, Deformable mirrors, Exoplanets, Stars, Astronomical imaging, Optical fabrication, Optical alignment, Polarization

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Proceedings Article | 9 September 2019 Presentation

The WFIRST coronagraph instrument (CGI) technology demonstration

N. Jeremy Kasdin, Bruce Macintosh, Margaret Turnbull, Vanessa Bailey, John Trauger, Bertrand Mennesson, Jason Rhodes, Margaret Frerking, Feng Zhao

Proceedings Volume 11117, 111170B (2019) https://doi.org/10.1117/12.2528929

KEYWORDS: Coronagraphy, Imaging spectroscopy, Planets, Infrared telescopes, James Webb Space Telescope, Exoplanets, Wavefronts, Algorithm development, Jupiter, Infrared radiation

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Proceedings Article | 1 August 2018 Presentation + Paper

The WFIRST coronagraph instrument: a major step in the exploration of sun-like planetary systems via direct imaging

Bertrand Mennesson, J. Debes, E. Douglas, B. Nemati, C. Stark, J. Kasdin, B. Macintosh, M. Turnbull, M. Rizzo, A. Roberge, N. Zimmerman, K. Cahoy, J. Krist, V. Bailey, J. Trauger, J. Rhodes, L. Moustakas, M. Frerking, F. Zhao, I. Poberezhskiy, R. Demers

Proceedings Volume 10698, 106982I (2018) https://doi.org/10.1117/12.2313861

KEYWORDS: Stars, Coronagraphy, Planets, Imaging systems, Solar system, Clouds, Spatial resolution, Mid-IR, Visible radiation, Exoplanets

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Proceedings Article | 10 July 2018 Presentation

The WFIRST coronagraph instrument: technology demonstration and science potential (Conference Presentation)

N. Jeremy Kasdin, Margaret Turnbull, Bruce Macintosh, Nikole Lewis, Aki Roberge, John Trauger, Bertrand Mennesson, Vanessa Bailey, Jason Rhodes, Leonidas Moustakas, Margaret Frerking, Feng Zhao, Richard Demers, Ilya Poberezhskiy

Proceedings Volume 10698, 106982H (2018) https://doi.org/10.1117/12.2315002

KEYWORDS: Imaging spectroscopy, Coronagraphy, Exoplanets, Infrared telescopes, James Webb Space Telescope, Space telescopes, Spectroscopes, Planets, Infrared radiation, Telescopes

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Proceedings Article | 13 April 2018 Paper

Progress towards picometer accuracy laser metrology for the space interferometry mission: update

Peter Halverson, Oscar Alvarez-Salazar, Alireza Azizi, Frank Dekens, Bijan Nemati, Feng Zhao

Proceedings Volume 10568, 105682L (2018) https://doi.org/10.1117/12.2500128

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Proceedings Article | 21 November 2017 Open Access

Progress towards picometer accuracy laser metrology for the space interferometry mission

Peter Halverson, Andreas Kuhnert, Jennifer Logan, Martin Regehr, Stuart Shaklan, Robert Spero, Feng Zhao, Tallis Chang, Edouard Schmidtlin, Roman Gutierrez, Thomas VanZandt, Jeffrey Yu

Proceedings Volume 10569, 1056919 (2017) https://doi.org/10.1117/12.2307867

KEYWORDS: Metrology, Heterodyning, Interferometers, Photodiodes, Laser metrology, Beam splitters, Calibration, Interferometry, Distance measurement, Sensors

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Proceedings Article | 5 September 2017 Presentation + Paper

Laser metrology for ultra-stable space-based coronagraphs

Joel Nissen, Alireza Azizi, Feng Zhao, Shannon Kian Zareh, Shanti Rao, Jeffrey Jewell, Dustin Moore

Proceedings Volume 10398, 103980I (2017) https://doi.org/10.1117/12.2274704

KEYWORDS: Space telescopes, Laser metrology, Active optics, Wavefronts, Telescopes, Optical alignment, Optical sensing, Wavefront sensors

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Proceedings Article | 1 September 2017 Presentation + Paper

The WFIRST coronagraph instrument optical design update

Hong Tang, Richard Demers, John Krist, James McGuire, Mayer Rud, Feng Zhao

Proceedings Volume 10400, 1040003 (2017) https://doi.org/10.1117/12.2274549

KEYWORDS: Optical design, Wavefronts, Exoplanets, Coronagraphy, Stars, Channel projecting optics, Iterated function systems, Polarization, Optical coatings, Stray light analysis

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SPIE Journal Paper | 11 March 2016

Coronagraph instrument for WFIRST-AFTA

M. Charley Noecker, Feng Zhao, Rick Demers, John Trauger, Olivier Guyon, N. Jeremy Kasdin

JATIS, Vol. 2, Issue 01, 011001, (March 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.1.011001

KEYWORDS: Coronagraphy, Space telescopes, Telescopes, Exoplanets, Planets, Stars, Mirrors, Observatories, Optical instrument design, Wavefronts

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Proceedings Article | 16 September 2015 Paper

The WFIRST/AFTA coronagraph instrument optical design

Hong Tang, Mayer Rud, Richard Demers, Renaud Goullioud, John Krist, Fang Shi, Feng Zhao

Proceedings Volume 9605, 960504 (2015) https://doi.org/10.1117/12.2188446

KEYWORDS: Coronagraphy, Telescopes, Iterated function systems, Mirrors, Infrared telescopes, Polarization, Optical design, Collimators, Cameras, Stars

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Proceedings Article | 2 August 2014 Paper

WFIRST-AFTA coronagraph instrument overview

Feng Zhao

Proceedings Volume 9143, 91430O (2014) https://doi.org/10.1117/12.2060319

KEYWORDS: Coronagraphy, Photomasks, Exoplanets, Space telescopes, Telescopes, Wavefronts, Stars, Wavefront sensors, Infrared telescopes, Speckle

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Proceedings Article | 2 August 2014 Paper

Technology development towards WFIRST-AFTA coronagraph

Ilya Poberezhskiy, Feng Zhao, Xin An, Kunjithapatham Balasubramanian, Ruslan Belikov, Eric Cady, Richard Demers, Rosemary Diaz, Qian Gong, Brian Gordon, Renaud Goullioud, Frank Greer, Olivier Guyon, Michael Hoenk, N. Jeremy Kasdin, Brian Kern, John Krist, Andreas Kuhnert, Michael McElwain, Bertrand Mennesson, Dwight Moody, Richard Muller, Bijan Nemati, Keith Patterson, A. J. Riggs, Daniel Ryan, Byoung-Joon Seo, Stuart Shaklan, Erkin Sidick, Fang Shi, Nicholas Siegler, Rémi Soummer, Hong Tang, John Trauger, J. Kent Wallace, Xu Wang, Victor White, Daniel Wilson, Karl Yee, Hanying Zhou, Neil Zimmerman

Proceedings Volume 9143, 91430P (2014) https://doi.org/10.1117/12.2060320

KEYWORDS: Coronagraphy, Sensors, Wavefronts, Wavefront sensors, Iterated function systems, Photomasks, Space telescopes, Exoplanets, Deformable mirrors, Planets

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Proceedings Article | 2 August 2014 Paper

The WFIRST-AFTA coronagraph design update

R. Goullioud, F. Zhao, H. Tang, J. Wu

Proceedings Volume 9143, 91430S (2014) https://doi.org/10.1117/12.2057393

KEYWORDS: Coronagraphy, Photomasks, Mirrors, Space telescopes, Telescopes, Staring arrays, Iterated function systems, Cameras, Surface plasmons, Deformable mirrors

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Proceedings Article | 28 July 2008 Paper

SIM-Lite: status of the engineering progress toward flight

Frank Dekens, Eric Bloemhof, Serge Dubovitsky, Daniel Eldred, Renaud Goullioud, Muthu Jeganathan, Fabien Nicaise, Feng Zhao

Proceedings Volume 7013, 70134U (2008) https://doi.org/10.1117/12.789828

KEYWORDS: Metrology, Sensors, Interferometers, Actuators, Ferroelectric materials, Mirrors, Electronics, Cameras, Laser metrology, Switches

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Proceedings Article | 28 June 2006 Paper

An analysis of the phase dispersion in the symmetric beam combiner

Hong Tang, Feng Zhao

Proceedings Volume 6268, 62683F (2006) https://doi.org/10.1117/12.674156

KEYWORDS: Beam splitters, Optical coatings, Reflection, Glasses, Visibility, Antireflective coatings, Reflectivity, Dispersion, Polarization, Astronomy

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Proceedings Article | 14 February 2005 Paper

Estimation of cyclic error due to scattering in the internal OPD metrology of the Space Interferometry Mission

Hong Tang, Feng Zhao

Proceedings Volume 5776, (2005) https://doi.org/10.1117/12.611645

KEYWORDS: Light scattering, Scattering, Sensors, Laser scattering, Metrology, Beam splitters, Stars, Interferometers, Error analysis, Diffraction

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Proceedings Article | 14 February 2005 Paper

Laser metrology in the micro-arcsecond metrology testbed

Xin An, David Marx, Renaud Goullioud, Feng Zhao

Proceedings Volume 5634, (2005) https://doi.org/10.1117/12.580030

KEYWORDS: Metrology, Interferometers, Laser metrology, Heterodyning, Stars, Sensors, Mirrors, Electronics, Optical alignment, Diffraction

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Proceedings Article | 14 February 2005 Paper

Development of high-precision laser heterodyne metrology gauges

Feng Zhao

Proceedings Volume 5634, (2005) https://doi.org/10.1117/12.569844

KEYWORDS: Heterodyning, Interferometers, Metrology, Laser metrology, Diffraction, Beam splitters, Distance measurement, Optical testing, Mirrors, Sensors

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Proceedings Article | 30 September 2004 Paper

Metrology system for the Terrestrial Planet Finder Coronagraph

Stuart Shaklan, Luis Marchen, Feng Zhao, Robert Peters, Timothy Ho, Buck Holmes

Proceedings Volume 5528, (2004) https://doi.org/10.1117/12.559998

KEYWORDS: Mirrors, Metrology, Coronagraphy, Planets, Motion models, Laser stabilization, Wavefronts, Space telescopes, Stars, Monochromatic aberrations

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Proceedings Article | 26 February 2003 Paper

SIM external metrology beam launcher (QP) development

Lawrence Ames, Robert Barrett, Raymond Bell, Lawrence Dries, Kalyan Dutta, Peter Halverson, Buck Holmes, Eric Kvamme, David Leary, Patrick Perkins, Mark Scott, Timothy Van Eck, Feng Zhao

Proceedings Volume 4852, (2003) https://doi.org/10.1117/12.460946

KEYWORDS: Mirrors, Optical testing, Sensors, Distance measurement, Metrology, Interferometers, Optical fibers, Bragg cells, Interferometry, Heterodyning

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Proceedings Article | 26 February 2003 Paper

SIM internal metrology beam launcher development

Feng Zhao, Rosemary Diaz, Gary Kuan, Norbert Sigrist, Yuri Beregovski, Lawrence Ames, Kalyan Dutta

Proceedings Volume 4852, (2003) https://doi.org/10.1117/12.460940

KEYWORDS: Metrology, Interferometers, Diffraction, Mirrors, Stars, Beam splitters, Heterodyning, Collimators, Optical testing, Oscillators

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Proceedings Article | 26 February 2003 Paper

MAM testbed data analysis: cyclic averaging

Xiaopei Pan, Feng Zhao, Michael Shao

Proceedings Volume 4852, (2003) https://doi.org/10.1117/12.460723

KEYWORDS: Metrology, Calibration, Interferometers, Beam splitters, Data analysis, Phase measurement, Spectroscopy, Mirrors, Optical testing, Interferometry

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Proceedings Article | 7 May 1999 Paper

Common-path multichannel heterodyne laser interferometer for subnanometer surface metrology

Feng Zhao, Jennifer Logan, Stuart Shaklan, Michael Shao

Proceedings Volume 3740, (1999) https://doi.org/10.1117/12.347766

KEYWORDS: Heterodyning, Interferometers, Wavefronts, Metrology, Stray light, Optical testing, Signal detection, Adaptive optics, Sensors, Detector arrays

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Proceedings Article | 1 February 1998 Paper

Modular WDM add/drop multiplexers

Koichi Sayano, Harold Miller, Boris Volodin, Feng Zhao, Neven Karlovac

Proceedings Volume 3234, (1998) https://doi.org/10.1117/12.300932

KEYWORDS: Wavelength division multiplexing, Multiplexers, Holography, Multiplexing, Optical filters, Volume holography, Crystals, Fiber Bragg gratings

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SPIE Journal Paper | 1 October 1997

Ultraviolet Ca K-line narrow-bandwidth imaging filters based on holographic Bragg gratings in photorefractive materials

Feng Zhao, Koichi Sayano, Harold Miller, Jason Corwin, Nicolette Werner

OE, Vol. 36, Issue 10, (October 1997) https://doi.org/10.1117/12.10.1117/1.601311

KEYWORDS: Optical spheres, Optical filters, Diffraction gratings, Diffraction, Crystals, Ultraviolet radiation, Holography, Absorption, Stars, Space telescopes

Proceedings Article | 22 September 1997 Paper

Improved UV photorefractive LiNbO3 crystals and their applications in Ca K-line narrow-bandwidth imaging filters

Feng Zhao, Koichi Sayano, Harold Miller, Jason Corwin, Nicolette Werner

Proceedings Volume 3137, (1997) https://doi.org/10.1117/12.287784

KEYWORDS: Diffraction gratings, Crystals, Ultraviolet radiation, Optical filters, Absorption, Diffraction, Holography, Calcium, Image filtering, Optical filtering

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Proceedings Article | 25 October 1996 Paper

Nonlinear photorefractive volume holograms: spectral and spatial diffraction properties

Feng Zhao, Hanying Zhou

Proceedings Volume 2849, (1996) https://doi.org/10.1117/12.255476

KEYWORDS: Holograms, Diffraction, Crystals, Laser crystals, Multiplexing, Nonlinear crystals, Anisotropy, 3D image reconstruction, Volume holography, Holography

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SPIE Journal Paper | 1 July 1996

Temperature dependence of light-induced scattering in a Ce:Fe:LiNbO3 photorefractive crystal

Feng Zhao, Hanying Zhou, Zhongkong Wu, Francis Yu, Deanna McMillen

OE, Vol. 35, Issue 07, (July 1996) https://doi.org/10.1117/12.10.1117/1.600775

KEYWORDS: Crystals, Scattering, Signal to noise ratio, Light scattering, Laser scattering, Laser crystals, Ions, Electrons, Interference (communication), Two wave mixing

Proceedings Article | 29 April 1996 Paper

Application of narrow-bandwidth volume-holographic gratings in photorefractive materials

Koichi Sayano, Feng Zhao

Proceedings Volume 2795, (1996) https://doi.org/10.1117/12.239227

KEYWORDS: Optical filters, Holography, Volume holography, Image storage, Fourier transforms, Optical storage, Image filtering, Multiplexing, Holograms, Visible radiation

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Proceedings Article | 18 August 1995 Paper

Temperature dependence of light-induced scattering in a Ce:Fe:LiNbO3 photorefractive crystal

Feng Zhao, Hanying Zhou, Zhongkong Wu, Francis Yu, Deanna McMillen

Proceedings Volume 2529, (1995) https://doi.org/10.1117/12.217024

KEYWORDS: Crystals, Scattering, Signal to noise ratio, Light scattering, Laser scattering, Ions, Electrons, Interference (communication), Thermal effects, Denoising

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